Die shoe



June 20, 1933. E; A BAUMBACH 1,915,080

DIE SHOE Filed Aug. 28, 1931 3 Sheets-Sheet 1 June-20, 1933. E, BAUMBACHI 1,915,080

DIE SHOE Filed Aug. 28, 1931 3 Sheets-Sheet 2 Jun 2Q 1.933. BAUMBACH1,915,080

DIE SHOE Filed Aug. 28, 1931' 3 Sheets-Sheet 3 I g l I l I 11? 16 J J J2J2 13 0/ 15226227577? Patented June 20, 1933 UNETFLD STATES EMIL A.BAUMBACI-I, OF CHICAGO, ILLINOIS DIE SHOE Application filed August 28,1931.

My invention relates to die shoes, and particularly, to theirmanufacture. Hitherto, die shoes have been made of cast metal, such assteel, or the like. However, such shoes have proven unsatisfactory,since they tend to crack under the strain of being bolted to the bedplates of punch presses in which they are used.

It is, therefore, an object of my invention to provide a die shoe of amaterial less liable to crack under the strain of being bolted to thebed plate.

Another object of the invention is to reduce the cost of manufacture.

Other objects will be apparent from the description and claims.

In the drawings, in which several embodiments of my invention are shown,

Figure 1 is a plan view of a die set;

Fig. 2 is a plan view showing the sections used in making the die shoeshown in Fig. 1;

Fig. 3 is a section on the line 3-3 of Fig. 1;

Fig. 4 is a section on the line %4 of Fig. 1

Fig. 5 is an enlarged sectional view showing the manner in which thesections are secured together;

Fig. 6 is a perspective view of a relatively thin securing member, shownwelded in place M in Figs. 1, 2, 3 and 4;

Fig. 7 is a plan view of a different form of die set;

Fig. 8 is a plan View showing the sections used in making the die shoeof Fig. 7;

m, Fig. 9 is a section on the line 9-9 of Fig. 7

Fig. 10 is a plan view of yet another form of die set;

Fig. 11 is a plan view of the sections used in making the die shoe ofFig. 10; and [m Fig. 12 is a section on the line 1212 of Fig. 10.

First referring to Figs. 1 to 6, inclusive, the die set shown thereincomprises a punch holder 1 having ashank portion 2 and a punch holdingportion 3 having the usual bushed guide openings 4, a die shoe 5 havinga relatively thick die supporting portion 6 provided with a plane smoothupper face 7 on which the die rests, a plane lower face 8 which r,"rests on the bed of the machine, and a number of relatively thinsecuring flange portions Serial No. 559,886.

9 having their upper surfaces 10 substantially below the upper face 7 ofthe die supporting portion 6 and leader pins 11 secured in the thickerportion 6 of the die shoe for cooperation with the hushed openings ofthe punch holder.

The construction shown in Figs. 7 to 12 inclusive is substantially thesame as that just described except as to the shape of the punch holderand die shoe.

The process of manufacture of the die shoes shown is as follows:

A segment, of the thickness and outline esired for the die supportingportion 6 of the die shoe, is cut, as by a blow torch, from hotrolledplate. Other segments 9, shown separately and in perspective inFig. 6 are similarly cut to the outline desired for the securing flangeportions from somewhat thin-v ner hot rolled plate. These securingflange portions 9 are placed in proper position with respect to the diesupporting portion 6 and welded thereto at their upper and lower edgesat 12 and 13, as shown in Fig. 5.

In practice, it has been found that die shoes manufactured as describedabove are much more durable and less apt to crack under the strain ofbeing bolted to the bed plate of punch presses than those heretoforemade of cast iron, due to the fact that rolled 50 steel is less brittlethan cast iron.

Further modifications will be apparent to those skilled in the art andit is desired, therefore that my invention be limited only by the priorart and the scope of the ap- 35 pended claims.

Having thus described my invention, what I claim and desire to secure byLetters Patent is:

1. A built up die shoe of the character described comprising arelatively thick rolled plate die supporting portion having plane,smooth, parallel upper and lower faces, relatively thin rolled platesecuring flange members, said die supporting portion and saidflangemembers having conforming edge contours, said contour conformingedges being welded together to form an integral die shoe.

2. A built up die shoe of the character described comprising arelatively thick rolled plate die supporting portion having plane,smooth, parallel upper and lower faces, relatively thin rolled platesecuring flange members, said die supporting portion and said flangemembers having edge surfaces conforming in surface contour, said thickportion and said thin member being welded together at the edges of saidconforming contours to form an integral die shoe.

3. In a built up die shoe of the character described, an integral onepiece central member for the die to rest on, relatively thin securingmembers having edge portions conforming to the contour of said centralmemher, said securing members being Welded to said central member attheir conforming contours.

4. In a built up die shoe of the character described, an integral onepiece central member for the die to rest on and arranged to supportleader pins therein and having par allel upper and lower surfaces and anirregular vertical side contour, relatively thin securing members havingparallel upper and lower surfaces and vertical side contourscorresponding to irregularities in the side con tour of the centralmember, said thin securing members being Welded to said central memberwith the lower surfaces of all of said members in alignment, saidwelding being accomplished along the edges of said conforming side facesto form an integral die shoe.

In witness whereof, I have hereunto subscribed my name.

EMIL A. BAUMBACH.

